U.S. patent application number 16/134027 was filed with the patent office on 2019-03-21 for fluorescent projection display device capable of photovoltaic generation and display system employing the same.
This patent application is currently assigned to Korea Electronics Technology Institute. The applicant listed for this patent is Korea Electronics Technology Institute. Invention is credited to Chul-Jong HAN, Ji-Yong KIM, Min-Suk OH, Jeong-Min YI, Byung-Wook YOO.
Application Number | 20190086652 16/134027 |
Document ID | / |
Family ID | 63637753 |
Filed Date | 2019-03-21 |
United States Patent
Application |
20190086652 |
Kind Code |
A1 |
HAN; Chul-Jong ; et
al. |
March 21, 2019 |
FLUORESCENT PROJECTION DISPLAY DEVICE CAPABLE OF PHOTOVOLTAIC
GENERATION AND DISPLAY SYSTEM EMPLOYING THE SAME
Abstract
The present disclosure provides a fluorescent projection display
device capable of performing both the generation of photovoltaic
electricity and the display of visual images, and a display system
employing the fluorescent projection display device. The
fluorescent projection display device capable of photovoltaic
generation according to the present disclosure includes: a
transparent film including luminescent materials configured to
reflect incident sunlight internally to concentrate the incident
sunlight, and to be excitated by input light in an excitation
wavelength range to radiate a display light corresponding to the
light in the excitation wavelength range; and a solar cell disposed
on at least one edge of the transparent film to convert
concentrated sunlight propagated from the transparent film into
electricity.
Inventors: |
HAN; Chul-Jong; (Yongin-si,
KR) ; OH; Min-Suk; (Seoul, KR) ; YOO;
Byung-Wook; (Seoul, KR) ; KIM; Ji-Yong;
(Cheonan-si, KR) ; YI; Jeong-Min; (Seoul,
KR) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Korea Electronics Technology Institute |
Seongnam-si |
|
KR |
|
|
Assignee: |
Korea Electronics Technology
Institute
Seongnam-si
KR
|
Family ID: |
63637753 |
Appl. No.: |
16/134027 |
Filed: |
September 18, 2018 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
H02S 99/00 20130101;
C09K 11/06 20130101; H01L 31/055 20130101; G02B 19/0004 20130101;
G02B 19/0042 20130101; G03B 21/62 20130101; H01L 31/02322 20130101;
H01L 31/0547 20141201 |
International
Class: |
G02B 19/00 20060101
G02B019/00; G03B 21/62 20060101 G03B021/62; H02S 99/00 20060101
H02S099/00 |
Foreign Application Data
Date |
Code |
Application Number |
Sep 18, 2017 |
KR |
10-2017-0119356 |
Claims
1. fluorescent projection display device capable of photovoltaic
generation, comprising: a transparent film including luminescent
materials configured to reflect incident sunlight internally to
concentrate the incident sunlight, and to be excitated by input
light in an excitation wavelength range to radiate a display light
corresponding to the light in the excitation wavelength range; and
a solar cell disposed on at least one edge of the transparent film
to convert concentrated sunlight propagated from the transparent
film into electricity.
2. The fluorescent projection display device of claim 1, further
comprising: a transparent substrate disposed on at least one side
of the transparent film to support the transparent film.
3. The fluorescent projection display device of claim 2, wherein
the luminescent materials have sizes of 50 nanometers or smaller
and an emission wavelength range of 420-650 nanometers or
narrower.
4. The fluorescent projection display device of claim 2, wherein
the transparent film has a transmittance of 30% or higher and a
haze of 3% or less.
5. A fluorescent projection display system capable of photovoltaic
generation, comprising: a fluorescent projection display device
comprising a transparent film including luminescent materials
configured to reflect incident sunlight internally to concentrate
the incident sunlight, and to be excitated by input light in an
excitation wavelength range to radiate a display light
corresponding to the light in the excitation wavelength range, and
a solar cell disposed on at least one edge of the transparent film
to convert concentrated sunlight propagated from the transparent
film into electricity; and a projector configured to radiate a
projection beam the excitation wavelength range to the fluorescent
projection display device so that the fluorescent projection
display device displays an image corresponding to the projection
beam.
6. The fluorescent projection display system of claim 5, wherein
the excitation wavelength range is below 420 nm.
7. The fluorescent projection display system of claim 6, wherein
the projector comprises a light emitting diode or a laser projector
as a light source.
8. The fluorescent projection display system of claim 7, wherein
the projector comprises a digital light processing (DLP) processor
or a Galvano scanner as an image forming device.
Description
CROSS-REFERENCE TO RELATED APPLICATION
[0001] The present application claims the benefit of priority to
Korean Patent Application No. 10-2017-0119356, filed on Sep. 18,
2017, in the Korean Intellectual Property Office, the disclosure of
which is incorporated herein in its entirety by reference.
TECHNICAL FIELD
[0002] The present disclosure relates to a fluorescent projection
display system and, more particularly, to a fluorescent projection
display device capable of generating photovoltaic electricity while
performing a projection display function. Also, the present
disclosure relates to a display system employing the fluorescent
projection a display device.
BACKGROUND
[0003] A luminescent solar concentrator is a device including a
transparent waveguide embedding luminescent molecules and a solar
cell by attached at an edge of the transparent waveguide to
generate electricity from sunlight. Though the research of the
luminescent solar concentrator has been at a standstill because of
the absence of a suitable luminescent materials having wavelength
matching property and reliability, the emergence of quantum dot
fluorescent materials has stimulated the research and development
of new technologies.
[0004] The luminescent solar concentrator may show lower efficiency
than a conventional opaque solar cells, but the applications for
the luminescent solar concentrator are being contemplated
consistently in consideration of its transparent property and
resultant functionality. Therefore, efforts are being made to
impart additional functionalities to the luminescent solar
concentrator.
SUMMARY
[0005] According to the present disclosure, provided are a
fluorescent projection display device capable of performing both
the generation of photovoltaic electricity and the display of
visual images, and a display system employing the fluorescent
projection display device.
[0006] Additional aspects will be set forth in part in the
description which follows and, in part, will be apparent from the
description, or may be learned by practice of the presented
exemplary embodiments.
[0007] According to an aspect of an exemplary embodiment, a
fluorescent projection display device capable of photovoltaic
generation includes: a transparent film including luminescent
materials configured to reflect incident sunlight internally to
concentrate the incident sunlight, and to be excitated by input
light in an excitation wavelength range to radiate a display light
corresponding to the light in the excitation wavelength range; and
a solar cell disposed on at least one edge of the transparent film
to convert concentrated sunlight propagated from the transparent
film into electricity.
[0008] The fluorescent projection display device may further
include a transparent substrate disposed on at least one side of
the transparent film to support the transparent film.
[0009] The luminescent materials may have sizes of 50 nanometers or
smaller and an emission wavelength range of 420-650 nanometers or
narrower.
[0010] The transparent film may have a transmittance of 30% or
higher and a haze of 3% or less.
[0011] According to an aspect of another exemplary embodiment, a
fluorescent projection display system capable of photovoltaic
generation includes: a fluorescent projection display device
comprising a transparent film including luminescent materials
configured to reflect incident sunlight internally to concentrate
the incident sunlight, and to be excitated by input light in an
excitation wavelength range to radiate a display light
corresponding to the light in the excitation wavelength range, and
a solar cell disposed on at least one edge of the transparent film
to convert concentrated sunlight propagated from the transparent
film into electricity; and a projector configured to radiate a
projection beam the excitation wavelength range to the fluorescent
projection display device so that the fluorescent projection
display device displays an image corresponding to the projection
beam.
[0012] The excitation wavelength range may be below 420 nm.
[0013] The projector may include a light emitting diode or a laser
projector as a light source.
[0014] The projector may include a digital light processing (DLP)
processor or a Galvano scanner as an image forming device.
[0015] In the fluorescent projection display device according to
the present disclosure, the luminescent materials doped in the
transparent film scatter sunlight and are excited by the light in
the excitation wavelength range to emit visible light. Also, the
solar cell disposed at the edge of the film generates photovoltaic
electric energy from the concentrated sunlight from the transparent
film. Thus, the fluorescent projection display device according to
the present disclosure may perform both the functions of generating
electricity by photovoltaic generation and displaying images.
[0016] Also, the fluorescent projection display device according to
the present disclosure can be used as a window-attachable solar
cell because it is transparent and capable of generate photovoltaic
electric energy.
[0017] Thus, the functional versatility and utility of the
fluorescent projection display device according to the present
disclosure can be extended to three types of devices: a transparent
window, a photovoltaic energy generation device, and a display
device that may be used to display a transparent augmented reality
image.
BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order that the disclosure may be well understood, there
will now be described various forms thereof, given by way of
example, reference being made to the accompanying drawings, in
which:
[0019] FIG. 1 is an exploded view of a fluorescent projection
display device capable of photovoltaic generation according to an
embodiment of the present disclosure;
[0020] FIG. 2 is a perspective view of the fluorescent projection
display device capable of photovoltaic generation of FIG. 1;
[0021] FIG. 3 is an enlarged view of a portion A in FIG. 1; and
[0022] FIG. 4 schematically illustrates a display system employing
the fluorescent projection display device capable of photovoltaic
generation according to an embodiment of the present
disclosure.
[0023] The drawings described herein are for illustration purposes
only and are not intended to limit the scope of the present
disclosure in any way.
DETAILED DESCRIPTION
[0024] In the following description and the accompanied drawings,
detailed descriptions of well-known functions or configuration that
may obscure the subject matter of the present disclosure will be
omitted for simplicity. It is to be noted that the same components
are designated by the same reference numerals throughout the
drawings.
[0025] The terms and words used in the following description and
appended claims are not necessarily to be construed in an ordinary
sense or a dictionary meaning, and may be appropriately defined
herein to be used as terms for describing the present disclosure in
the best way possible. Such terms and words should be construed as
meaning and concept consistent with the technical idea of the
present disclosure. The embodiments described in this specification
and the configurations shown in the drawings are merely preferred
embodiments of the present disclosure and are not intended to limit
the technical idea of the present disclosure. Therefore, it should
be understood that there may exist various equivalents and
modifications which may substitute the exemplary embodiments at the
time of filing of the present application.
[0026] Hereinbelow, exemplary embodiments of the present disclosure
will be described in detail with reference to the accompanying
drawings.
[0027] FIG. 1 is an exploded view of a fluorescent projection
display device capable of photovoltaic generation according to an
embodiment of the present disclosure, FIG. 2 is a perspective view
of the fluorescent projection display device capable of
photovoltaic generation of FIG. 1, and FIG. 3 is an enlarged view
of a portion A in FIG. 1.
[0028] Referring to FIGS. 1-3, the fluorescent projection display
device 10 according to the present embodiment includes a
transparent film 19 and a solar cell 40. The fluorescent projection
display device 10 may further include a transparent substrate 11 or
15 disposed on at least one surface of the transparent film 19 to
support the transparent film 19.
[0029] Although the projection display device 10 is shown as
including the transparent substrates 11 and 15 in the drawings, the
projection display device 10 does not necessarily have to include
the transparent substrates 11 and 15. In the following description,
it is assumed that transparent substrates 11 and 15 are provided in
the projection display device 10.
[0030] The transparent film 19 is doped with luminescent molecules
13 that absorb incoming light with a excitation wavelength range
and re-emit visual light.
[0031] Such a transparent film 19 may be formed by dispersing a
nano-sized luminescent materials in a transparent plastic material.
The transparent plastic material may be composed of at least one of
various materials including inorganic materials and organic
materials. For example, poly-methyl-methacrylate (PMMA) which is a
transparent polymer resin may be used for the transparent plastic
material. Preferably, the transparency of the transparent plastic
material may be 80% or more.
[0032] The transparent film 19 may be formed by coating the
transparent polymer resin embedding the nano-sized luminescent
materials on the transparent substrates 11 and 15. However, the
present disclosure is not limited thereto, and the transparent film
19 may be made, by injection molding or the like, for example, by
use of a polymer composite material that can maintain its shape
without the assistance of the transparent substrates 11 and 15.
[0033] To summarize, the transparent film 19 is a composite
transparent film in which the luminescent materials 13 are embedded
in the transparent plastic material.
[0034] Here, the luminescent materials 13 are excitated by light in
a wavelength range other than a visible light range of 420-650
nanometers and emits light in the visible light range of 420-650
nanometers. It is preferable that the luminescent materials 13 have
sizes (a) of 50 nanometers or less, since scattering of light may
occur at the luminescent materials 13 when the size of the
luminescent materials 13 exceed 50 nm. The luminescent materials 13
may include semiconductor nano-sized crystalline particles.
[0035] For example, quantum dots may be used as the semiconductor
nano-sized crystalline particles.
[0036] Meanwhile, the luminescent materials 13 scatters incident
sunlight. When the sunlight is incident from outside, photons
collides with the luminescent materials 13 and to be scattered in
the transparent film 19. Some of the incident sunlight and the
scattered sunlight is reflected on the internal surface of the
transparent film 19. The reflected light may be totally reflected
several times internally in the transparent film 19 due to a
difference in refractive indices between the transparent film 19
and air, and moves inside the transparent film 19 to the edge of
the transparent film 19. The sunlight totally reflected internally
in the transparent film 19 is incident on and trapped by the solar
cell 40 located at the edge of the transparent film 19 and
converted to electricity.
[0037] The transparent film 19 may have a transmittance of 30% or
higher and a haze of 3% or less. Also, a concentration factor of
the transparent film 19 can be changed by adjusting the quantity
and size of the luminescent materials 13 in the transparent film
19.
[0038] On the other hand, the transparent substrates 11 and 15 are
colorless and transparent preferably. However, the present
disclosure is not limited thereto, and the transparent substrates
11 and 15 may be colored films while maintaining their
transparency. These transparent substrates which includes a first
transparent substrate 11 and a second transparent substrate 15
attached on respective sides of the transparent film 19 may support
and protect the transparent film 19.
[0039] The solar cell 40 is disposed to at least one edge of the
transparent film 19 and the transparent substrates 11 and 15 in the
projection display device 10 according to the present
embodiment.
[0040] Preferably, the solar cell 40 may be attached to an edge
having the largest area among the four edges of the transparent
film 19 and the transparent substrate 11, 15. However, the present
disclosure is not limited thereto, and the solar cell 40 may be
attached to all the four edges, for example.
[0041] For example, the solar cell 40 may be a thin film solar
cell, a compound semiconductor solar cell, a dye-sensitized solar
cell (DSSC), or an organic photovoltaic cell (OPV).
[0042] In case that a plurality of solar cells are installed at a
plurality of edges of the transparent film 19 and the transparent
substrates 11 and 15, the plurality of solar cells may be connected
in series so as to increase an output voltage that may be used
practically.
[0043] As described above, the fluorescent projection display
device 10 according to the present disclosure includes the
transparent film 19 doped with luminescent materials that scatter
sunlight and are excited by the light in the excitation wavelength
range to emit visible light, and the solar cell 40 disposed at the
edge of the film 19. Thus, the fluorescent projection display
device 10 according to the present disclosure may perform both the
functions of generating electricity by photovoltaic generation and
displaying images.
[0044] The fluorescent projection display device capable of
photovoltaic generation according to the present disclosure can be
used as a window-attachable solar cell because it is transparent
and capable of generate photovoltaic electric energy.
[0045] In such a case, the functional versatility and utility of
the fluorescent projection display device capable of photovoltaic
generation according to the present disclosure can be extended to
three types of devices: a transparent window, a photovoltaic energy
generation device, and a display device that may be used to display
a transparent augmented reality image.
[0046] A display system employing the fluorescent projection
display device capable of photovoltaic generation according to the
present embodiment will now be described with reference to FIG.
4.
[0047] FIG. 4 schematically illustrates a display system employing
the fluorescent projection display device capable of photovoltaic
generation according to an embodiment of the present
disclosure.
[0048] The display system 100 according to the present embodiment
includes a fluorescent projection display device 10 capable of
photovoltaic generation and a projector 20 that illuminates a
projection beam on at least one surface of the fluorescent
projection display device 10.
[0049] The projector 20 radiates the projection beam having a
wavelength range that may excitate the fluorescent projection
display device 10 so that the fluorescent projection display device
10 displays an image corresponding to the projection beam.
[0050] Here, a light source of the projector 20 that emits the
projection beam may be an light emitting diode (LED) or a laser
projector. The light generated by the light source may be in a
wavelength range below 420 nm which is lower than the wavelength of
the visible light.
[0051] In addition, the projector 20 includes an image forming
device such as a digital light processing (DLP) processor laid out
on a digital micro-mirror device (DMD) or a Galvano scanner.
[0052] In this specification including the claims, the term
"luminescent materials" may be a synonym of "fluorescent
materials". The term "luminescent materials" does not necessarily
mean a plurality kinds of luminescent materials are present in the
transparent film 19 even though the term is used in plural form.
The "luminescent materials" may mean luminescent particles, but the
luminescent materials are not limited to solid state materials.
[0053] The description of the disclosure is merely exemplary in
nature and, thus, variations that do not depart from the substance
of the disclosure are intended to be within the scope of the
disclosure. Such variations are not to be regarded as a departure
from the spirit and scope of the disclosure.
* * * * *